Infrared and Laser Engineering, Volume. 50, Issue 10, 20210294(2021)

Denoising algorithm based on improved Markov random field for event camera

Pengju Li1, Yasheng Zhang2, Yuqiang Fang2, and Zhiyong Yin2
Author Affiliations
  • 1Graduate College, Space Engineering University, Beijing 101416, China
  • 2Space Engineering University, Beijing 101416, China
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    Figures & Tables(12)
    Markov net model
    Flow chart of ICM algorithm
    Visualization of simulated event stream data
    [in Chinese]
    Reduction effect comparison of different proportions of noise
    Comparison chart of Ptrue and Ploss in different noise
    Visualization of real event stream data
    Comparison of noise reduction effect of real event stream data
    • Table 1. Main parameters of Dvsnoisefilter

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      Table 1. Main parameters of Dvsnoisefilter

      ParameterValue
      Background activity support min1
      Background activity support max8
      Background activity time/μs2 000
      Refractory period time/μs100
    • Table 2. Statistics table of true event rate under different noise

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      Table 2. Statistics table of true event rate under different noise

      MethodReal events rate, Ptrue
      10%20%50%100%
      Initial state90.90%83.33%66.67%50.00%
      Filtering98.03%97.31%96.54%89.01%
      Proposed98.66%98.21%97.59%93.89%
    • Table 3. Statistics table of true event loss rate under different noise

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      Table 3. Statistics table of true event loss rate under different noise

      MethodLoss rate of real events, Ploss
      10%20%50%100%
      Filtering1.87%2.69%3.84%4.25%
      Proposed1.75%2.51%3.44%3.80%
    • Table 4. Statistics of noise reduction accuracy of real events by different algorithms

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      Table 4. Statistics of noise reduction accuracy of real events by different algorithms

      NumberPprecision
      Method50000-
      Filtering3552428.95%
      Proposed3298234.04%
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    Pengju Li, Yasheng Zhang, Yuqiang Fang, Zhiyong Yin. Denoising algorithm based on improved Markov random field for event camera[J]. Infrared and Laser Engineering, 2021, 50(10): 20210294

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    Paper Information

    Category: Special issue—Advanced design and manufacturing of optical system

    Received: May. 5, 2021

    Accepted: --

    Published Online: Dec. 7, 2021

    The Author Email:

    DOI:10.3788/IRLA20210294

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